title: Information processing versus social cognitive mediators of weight loss in a podcast-delivered health intervention.
abstract: Podcasting is an emerging technology, and previous interventions have shown promising results using theory-based podcast for weight loss among overweight and obese individuals. This study investigated whether constructs of social cognitive theory and information processing theories (IPTs) mediate the effect of a podcast intervention on weight loss among overweight individuals. Data are from Pounds off Digitally, a study testing the efficacy of two weight loss podcast interventions (control podcast and theory-based podcast). Path models were constructed (n = 66). The IPTs, elaboration likelihood model, information control theory, and cognitive load theory mediated the effect of a theory-based podcast on weight loss. The intervention was significantly associated with all IPTs. Information control theory and cognitive load theory were related to elaboration, and elaboration was associated with weight loss. Social cognitive theory constructs did not mediate weight loss. Future podcast interventions grounded in theory may be effective in promoting weight loss.
authors.affiliation: 1Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
authors.forename: Linda K
authors.initials: LK
authors.lastname: Ko
authors.forename: Gabrielle M
authors.initials: GM
authors.lastname: Turner-McGrievy
authors.forename: Marci K
authors.initials: MK
authors.lastname: Campbell
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D003071:Cognition; D005260:Female; D058015:Health Communication / Q000379:methods*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007257:Information Theory; D008297:Male; D008606:Mental Processes; D009657:North Carolina; D009765:Obesity / Q000523:psychology / Q000628:therapy*; D020377:Self Efficacy; D057211:Webcasts as Topic; D061217:Weight Reduction Programs / Q000379:methods* / Q000458:organization & administration
keywords: elaboration; information processing theory; mediators; podcasting intervention; social cognitive theory; weight loss